Bosch AE125 Support Question
Bosch AE125 Support Question
Find answers below for this question about Bosch AE125 - Water Heating Electric Tankless Whole House Heater.Need a Bosch AE125 manual? We have 1 online manual for this item!
Question posted by tulipstwo on March 20th, 2013
Bosch 16h Hydropower Waterheater Works Intermittently
Our water heater works intermittently. Even after turning the hot water tap on for 3-5 minutes, turning it on and off and checking connections within the heater we are unable to have a hot shower every day. We are many km from a service mechanic, situated in a country town in South Australia, and require a dependable product. Over the past 3 days it worked once yesterday afternoon and once last evening-without working working the 20 other attempts. Can you help please
Current Answers
Related Bosch AE125 Manual Pages
Handbook - Page 1
BoschThermotechnology Corp. 340 Mad River Park, Waitsfield, VT 05673
Telephone 866-642-3199
Bosch Thermotechnology Corp.
Handbook - Page 2
... any other application.
11. Contact Bosch Thermotechnology Corp. Warning: Do not install the heater in a safe place once your unit has been installed.
Warning: Mount the unit onto a flat section of wall, well away from the electrical supply before connecting to the grounding terminal of the electrical service of the cold water inlet.
8. READ AND FOLLOW...
Handbook - Page 3
...Locating the Powerstar
WARNING:
Do not install the water heater in a public place, locate the heater out of easy reach to the water heater as a result of freezing will not be ...AE125 Unit
3 x 240V AC (Canada 240VAC) 3 x 40 A (Canada 120 A) 26.85kW 95°F to 131°F 15 psi to 150 psi 0.8 US gal / min See Graph 1, Page 8 15½" H x 151/4" W x 4½" D 22 lbs
Note: The unit will work...
Handbook - Page 4
... 142 Section 19, Approval number P1-09-25)
• The heater must be connected directly to the main cold water supply and not to the unit.
DISCLAIMER:
In the Commonwealth of the inlet. Diagram 1
AE115 Unit
AE125 Unit
Water Connections
WARNING:
Do not install a non-return check valve within 10 feet of Massachusetts a pressure relief valve shall...
Handbook - Page 5
... not use pipe dope.
• Remember to keep the hot water pipe runs as short as a kit from Bosch Thermotechnology Corp. To operate correctly, th e heater needs the following running pressures:
Recommended water pressures Min water pressure 15 psi (1 Bar)
Max water pressure 150 psi (10 Bar)
Electrical connections
WARNING
The unit must be wired by a qualified electrician, in...
Handbook - Page 6
Diagram 3
AE125 Terminal Block Connection
The AE125 requires three independent 240V AC circuits protected by two separate and independent double pole breakers (as shown) rated at 40 A each .
6 Diagram 2
AE115 Terminal Block Connection
The AE115 requires two independent 240V AC circuits protected by three separate and independent double pole breakers (as shown) rated at 40 A each .
Handbook - Page 7
... required in the AE115 and three in accordance with the Canadian Electrical Code, C22.1-02.
• The incoming hole diameter on ...and into the saddle washer. Canada wiring -
AE115
AE125
NOT FOR U.S.A.
• Connect the red wires from the right hand terminal of ...can cause wires to heat up to the L1 terminals in the unit. (There are tightened securely. Connecting the supply cable -...
Handbook - Page 8
... breakers supplying the water heater. • Close all hot water taps and proceed to the next section.
Starting up the PowerStar
Checking for leaks. • With all hot water taps still open, inspect each tap to ensure all air in Graph 1 below. Turning the dial clockwise increases the temperature setting as indicated by the water heater and inspect all water connections for leaks and...
Handbook - Page 9
...minute.
• For the AE125 unit, using the outlet ball valve, ensure the flow rate does not exceed 3.5 gallons / minute. Note: These figures are not comfortable or qualified to perform this guide. If the inlet water...electrician. How the PowerStar works
• The PowerStar heats water continuously as different heater modules are off .
• The outlet water temperature can vary between ...
Handbook - Page 10
...switch it on. • Check that was in serious damage to the unit. The factory sets the temperature dial at the circuit breaker panel. • Turn on , the hot water will trip if the unit... installer or a licensed electrician. • If the unit has been used recently, run the water through for single phase AE125 unit. (AE115 does not have Elt 5 & 6 fitted and uses two supplies). (In Canada...
Handbook - Page 11
..., install before proceeding.
• Open nearest hot water tap to relieve pressure in the plumbing lines. • Position a bucket under the cold water inlet connection of the heater to catch any water that may
drain.
• Disconnect the cold water plumbing connection from the inlet (bottom right of heater) to blow out the heater (the flow transducer will be permanently damaged...
Handbook - Page 12
... before proceeding). The water supply is connected to the outlet of this manual.
12 Open all taps. Wait 5 minutes and check all hot water taps supplied by the heater. To return the heater to service, reinstall cover, open the inlet water supply to the heater, remove th e cover and locate thermal cutouts on a hot water tap while observing the flow transducer. Turn power supply on .
If...
Handbook - Page 13
... served by pushing the reset button located in the water path can restrict the flow of the cutout. Try resetting each heating module. Turn temperature knob located on Page 8 of each cutout by the heater are different than 0.5 Ohms or open, then it 's geographic location. Water flow is likely an issue with reduced output. flow...
Handbook - Page 14
... Using an Ohmmeter to check for each unit are ...heater. Verify the heater's inlet filter screen, faucet aerators, showerhe ads and whole house filters are restrictions in the plumbing
Water flow too low
Obstructions in the water path can restrict the flow of debris. bathtub).
• Slowly close the outlet shut-off valve, slowing the water flow rate until the temperature at the hot water...
Handbook - Page 15
... LIMITED 10 YEAR WARRANTY
COVERAGE
BOSCH THERMOTECHNOLOGY CORP. AE115 - 2.3gpm, AE125 - 3.5gpm. See service bulletin TWH-E2-04 at one major fixture running to get a usable hot water temperature.
The Heating Modules - Opening hot water isolation valve fully may be added in flow rate can restrict the flow of the water heater counterclockwise for further troubleshooting on...
Handbook - Page 16
... Other Than the Heating Modules - will not cause damage to misuse, alteration, neglect or accident, or; The person who initially installed the unit is limited to two (2) years from its component parts has been subject to the area in the water heater component part(s) or from the date of the water heater, Bosch Thermotechnology Corp. You...
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